Some ideas on improvement in prestressing process are raised according to the observation and analysis on modulus of elasticity, apparent yield limit, tensional strength and percentage elongation.
根据对弹性模量、非比例强度、抗拉强度和断裂伸长率的观察分析，提出了预应力钢丝张拉施工工艺的改进意见。
PS, PMMA, SAN) were studied. The results show that filling ROF in small amount to ductile PVC matrix leads apparent improvement of impact strength while tensile strength and modulus increase slightly.
实验发现将少许ROF 填充到硬聚氯乙烯韧性体中，能使基体的冲击强度和拉伸强度同时提高，获得既增韧又增强的双重效果。
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